butterfat {isdals}

Butterfat and dairy cattle

Description

Average butterfat content (percentages) for random samples of 20 cows (10 two year olds and 10 mature (greater than four years old)) from each of five breeds.

Usage

data(butterfat)

Format

A data frame with 100 observations on the following 3 variables.

Butterfat

a numeric vector

Breed

a factor with levels Ayrshire Canadian Guernsey Holstein-Fresian Jersey

Age

a factor with levels 2year Mature

Source

Hand et al. (1993). A Handbook of Small Data Sets. Chapman and Hall

Examples

data(butterfat)